Patents by Inventor Dehong Liu

Dehong Liu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20160266207
    Abstract: A method detects faults during a steady state of an operation of an induction motor. The method measures, in a time domain, a signal of a current powering the induction motor with a fundamental frequency and determines, in a frequency domain, a set of frequencies with non-zero amplitudes, such that a reconstructed signal formed by the set of frequencies with non-zero amplitudes approximates the signal measured in the time domain. The determining includes a compressive sensing via searching within a subband including the fundamental frequency of the signal subject to condition of a sparsity of the signal in the frequency domain. The method detects a fault in the induction motor if the set of frequencies includes a fault frequency different from the fundamental frequency.
    Type: Application
    Filed: March 10, 2015
    Publication date: September 15, 2016
    Inventor: Dehong Liu
  • Publication number: 20160216372
    Abstract: A method and system generates a three-dimensional (3D) image by first acquiring data from a scene using multiple parallel baselines and multiple different pulse repetition frequencies (PRF), wherein the multiple baselines are arranged in a hyperplane. Then, a 3D compressive sensing reconstruction procedure is applied to the data to generate the 3D image corresponding to the scene.
    Type: Application
    Filed: January 23, 2015
    Publication date: July 28, 2016
    Inventors: Dehong Liu, Petros Boufounos
  • Publication number: 20160204840
    Abstract: A method generates a three-dimensional (3D) scene image of a scene using a MIMO array including a set of antenna by first selecting a subsets of the antennas as transmit antennas and receive antennas. Radio frequency (RF) signal are transmitted into the scene using the subset of transmit antennas while the MIMO array is moving at a varying velocity. The RF signal are received at the subset of receive antennas as MIMO data, which is aligned and regularized. Then, a compressive sensing (CS)-based reconstruction procedure is applied to the aligned MIMO data to generate the 3D image of the scene.
    Type: Application
    Filed: January 12, 2015
    Publication date: July 14, 2016
    Inventor: Dehong Liu
  • Publication number: 20160205022
    Abstract: A load balancing method and a load balancing system are described in the present disclosure. In a load balancing process, services that can be provided by a service provision module are registered, after a service use module initiates a service request, a list of service provision modules that can provide a corresponding service is acquired according to the request, and then according to the list, a service provision module is selected from the list through a load balancing algorithm to perform the service requested by the service use module.
    Type: Application
    Filed: May 16, 2014
    Publication date: July 14, 2016
    Inventor: Dehong Liu
  • Patent number: 9335410
    Abstract: A spotlight synthetic aperture radar (SAR) image is generated by directing randomly a beam of transmitted pulses at a set of two or more areas using a steerable array of antennas. Each area is illuminated by an approximately equal number of the transmitted pulses. Then, a reconstruction procedure is applied independently to received signals from each area due to reflecting the transmitted pulses to generate the image corresponding to the set of areas.
    Type: Grant
    Filed: February 19, 2013
    Date of Patent: May 10, 2016
    Assignee: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Dehong Liu, Petros Boufounos
  • Patent number: 9261592
    Abstract: A method reconstructs a scene behind a wall by transmitting a signal through the wall into the scene. Parameters of the wall are estimated from a reflected signal. A model of a permittivity of the wall is generated using the parameters, and then the scene is reconstructed as an image from the reflected signal using the model and sparse recovery.
    Type: Grant
    Filed: January 13, 2014
    Date of Patent: February 16, 2016
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros Boufounos, Li Li, Dehong Liu, Hassan Mansour, Zafer Sahinoglu
  • Publication number: 20150355314
    Abstract: A system and method determines a noise free image of a scene located behind a wall. A transmit antenna emits a radar pulse from different locations in front of the wall, wherein the radar pulses propagate through the wall and are reflected by the scene as echoes. A set of stationary receive antennas acquire the echoes corresponding to each pulse transmitted from each different location. A radar imaging subsystem connected to the transmit antenna and the set of receive antennas determines a noisy image of the scene for each location of the transmit antenna. A total variation denoiser denoises each noisy image to produce a corresponding denoised image. A combiner combines incoherently the denoised images to produce the noise free image.
    Type: Application
    Filed: August 20, 2015
    Publication date: December 10, 2015
    Inventors: Hiroyuki Handa, Hassan Mansour, Dehong Liu, Ulugbek Kamilov
  • Patent number: 9182483
    Abstract: A synthetic aperture radar image is generated by directing randomly a beam of transmitted pulses at an area using a steerable array of antennas, wherein the area is uniformly by the transmitted pulses while the array of antennas moves along a path. A sparse reconstruction procedure is applied to received signals from the area due to reflecting the transmitted pulses to generate the image corresponding to the area. The radar system can operate in either sliding spotlight mode, or scan mode. The area can be of an arbitrary shape, and a resolution of the image can be increased.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: November 10, 2015
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T Boufounos
  • Publication number: 20150253423
    Abstract: A method generates a 3D synthetic aperture radar (SAR) image of an area by first acquiring multiple data sets from the area using one or more SAR systems, wherein each SAR system has one or more parallel baselines and multiple pulse repetition frequency (PRF), wherein the PRF for each baseline is different. The data sets are registered and aligned to produce aligned data sets. Then, a 3D compressive sensing reconstruction procedure is applied to the aligned data sets to generate the 3D image corresponding to the area.
    Type: Application
    Filed: March 10, 2014
    Publication date: September 10, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T. Boufounos
  • Publication number: 20150198713
    Abstract: A method reconstructs a scene behind a wall by transmitting a signal through the wall into the scene. Parameters of the wall are estimated from a reflected signal. A model of a permittivity of the wall is generated using the parameters, and then the scene is reconstructed as an image from the reflected signal using the model and sparse recovery.
    Type: Application
    Filed: January 13, 2014
    Publication date: July 16, 2015
    Applicant: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros Boufounos, Li Li, Dehong Liu, Hassan Mansour, Zafer Sahinoglu
  • Publication number: 20140266869
    Abstract: A synthetic aperture radar image is generated by directing randomly a beam of transmitted pulses at an area using a steerable array of antennas, wherein the area is uniformly by the transmitted pulses while the array of antennas moves along a path. A sparse reconstruction procedure is applied to received signals from the area due to reflecting the transmitted pulses to generate the image corresponding to the area. The radar system can operate in either sliding spotlight mode, or scan mode. The area can be of an arbitrary shape, and a resolution of the image can be increased.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Applicant: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Dehong Liu, Petros T Boufounos
  • Publication number: 20140232591
    Abstract: A spotlight synthetic aperture radar (SAR) image is generated by directing randomly a beam of transmitted pulses at a set of two or more areas using a steerable array of antennas. Each area is illuminated by an approximately equal number of the transmitted pulses. Then, a reconstruction procedure is applied independently to received signals from each area due to reflecting the transmitted pulses to generate the image corresponding to the set of areas.
    Type: Application
    Filed: February 19, 2013
    Publication date: August 21, 2014
    Applicant: MITSUBISHI ELECTRIC RESEARCH LABORATORIES, INC.
    Inventors: Dehong Liu, Petros Boufounos
  • Patent number: 8699790
    Abstract: A method Pan-sharpens a single panchromatic (Pan) image and a single multispectral (MS) image. A wavelet transform is applied to the Pan image and the MS image to obtain a wavelet transformed Pan image and a wavelet transformed MS image. Features, in the form of vectors, are extracted from the wavelet transformed Pan image and the wavelet transformed MS image. The features are separated into features without missing values and features with missing values. A dictionary is learned from features without missing values and used to predict the values for the features with the missing values. After the predicting, the features of the low frequency wavelet coefficients and the high frequency coefficients to form a fused wavelet coefficient map, and an inverse wavelet transform is applied to the fused wavelet coefficient map to obtain a fused MS image.
    Type: Grant
    Filed: May 23, 2012
    Date of Patent: April 15, 2014
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T. Boufounos
  • Patent number: 8693771
    Abstract: A single panchromatic (Pan) image and a single multispectral (MS) image are Pan-sharpened by extracting features from the Pan image and the MS image. The features are decomposed into features without missing values and features with missing values. A dictionary is learned from the features without missing values. The values for the features with the missing values are learned using the dictionary. The MS image is merged with the Pan image including the predicted values into a merged image, and the merged image is then Pan sharpened.
    Type: Grant
    Filed: November 18, 2011
    Date of Patent: April 8, 2014
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Dehong Liu, Petros T Boufounos
  • Patent number: 8487808
    Abstract: A synthetic aperture radar (SAR) system includes a non-uniform pulse generator, and an echo receiver. A SAR image is reconstructed from samples of received echoes, wherein transmitted pulses and reflected echoes overlap in time.
    Type: Grant
    Filed: March 31, 2011
    Date of Patent: July 16, 2013
    Assignee: Mitsubishi Electric Research Laboratories, Inc.
    Inventors: Petros Boufounos, Dehong Liu
  • Publication number: 20130129207
    Abstract: A single panchromatic (Pan) image and a single multispectral (MS) image are Pan-sharpened by extracting features from the Pan image and the MS image. The features are decomposed into features without missing values and features with missing values. A dictionary is learned from the features without missing values. The values for the features with the missing values are learned using the dictionary. The MS image is merged with the Pan image including the predicted values into a merged image, and the merged image is then Pan sharpened.
    Type: Application
    Filed: November 18, 2011
    Publication date: May 23, 2013
    Inventors: Dehong Liu, Petros T. Boufounos
  • Publication number: 20130129201
    Abstract: A method Pan-sharpens a single panchromatic (Pan) image and a single multispectral (MS) image. A wavelet transform is applied to the Pan image and the MS image to obtain a wavelet transformed Pan image and a wavelet transformed MS image. Features, in the form of vectors, are extracted from the wavelet transformed Pan image and the wavelet transformed MS image. The features are separated into features without missing values and features with missing values. A dictionary is learned from features without missing values and used to predict the values for the features with the missing values. After the predicting, the features of the low frequency wavelet coefficients and the high frequency coefficients to form a fused wavelet coefficient map, and an inverse wavelet transform is applied to the fused wavelet coefficient map to obtain a fused MS image.
    Type: Application
    Filed: May 23, 2012
    Publication date: May 23, 2013
    Inventors: Dehong Liu, Petros T. Boufounos
  • Publication number: 20110175770
    Abstract: A synthetic aperture radar (SAR) system includes a non-uniform pulse generator, and an echo receiver. A SAR image is reconstructed from samples of received echoes, wherein transmitted pulses and reflected echoes overlap in time.
    Type: Application
    Filed: March 31, 2011
    Publication date: July 21, 2011
    Inventors: Petros Boufounos, Dehong Liu